I bought a couple aerator screens for my boat. the nipple on the things are 3/4 in diameter. They wont fit the thru-hull fittings on my 91 Ranger. I measured the hole in the fitting and it looks like its closer to 5/8. I have done a search online for 5/8 fittings and came up with nothing. will I have to change the thru-hull fittings or can I get smaller nipples for the screens. The nipples screw off by the way. Have any of you dealt with this before. Looking for input before I start replacing things that I don't need to. Thanks, superfly.